Astron. Astrophys. 336, 920-924 (1998)

HD 163151: a new W UMa type system ^*

E. Rodríguez ¹, A. Claret ¹, J.M. García ², F.M. Zerbi ³, R. Garrido ¹, S. Martín ¹, C. Akan ⁴, K. Luedeke ⁵, V. Keskin ⁴, C. Ibanoglu ⁴, S. Evren ⁴, Z. Tunca ⁴, R. Pekünlü ⁴, M. Paparó ⁶, J. Nuspl ⁶, K. Krisciunas ⁷ and S.Y. Jiang <sup>8

1</sup> Instituto de Astrofísica de Andalucía, CSIC, P.O. Box 3004, E-18080 Granada, Spain
² Departamento de Física, E.U.I.T. Industriales, UPM, Ronda de Valencia 3, E-28012 Madrid, Spain
³ Optics Department, Osservatorio Astronomico di Brera/Merate, Via Bianchi 46, I-23807 Merate (Lc), Italy
⁴ Ege University Observatory, Bornova 35100, Izmir, Turkey
⁵ 9624 Giddings Avenue NE, Albuquerque, NM 87109, USA
⁶ Konkoly Observatory, 1525 Budapest XII, P.O. Box 67, Hungary
⁷ Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195, USA
⁸ Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China

Received 5 February 1998 / Accepted 18 May 1998

Abstract

HD 163151 is discovered to be a new variable as a part of a W UMa system. In this paper we present complete uvby light curves. Additional Crawford H and Johnson BV data are also obtained. A detailed photometric analysis based on these observations is presented using the WD code. Several tests have been carried out concerning mass ratio and effective temperatures. The best fitting was achieved with q = 0.27 and T₁=6450 K (fixed) and T₂ = 6130 K. Moreover, the light curves show evidences of spots in one of the components.

Key words: binaries: visual stars: individual: HD 163151 stars: fundamental parameters techniques: photometric

* Tables 2 to 5 will be accessible only in electronic form at the CDS

© European Southern Observatory (ESO) 1998

Online publication: July 27, 1998

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